Fast, Reliable Duct Repair & Sealing Across Agoura Hills
Duct repair and sealing in Agoura Hills typically runs $280-$650 for most residential jobs, with same-day service available when you call before noon. We’re Bellows Air Duct & Vent Co., and we’ve been driving out to Agoura Hills from our Los Angeles base since 1984. The 25-mile trip up the 101 puts us in your driveway within about an hour, and we know the area well enough to find your house without you walking us through every turn off Kanan Road or Chesebro. Call (844) 685-6342 for a free estimate and we’ll show you exactly what’s wrong before we quote a price.
Agoura Hills homes face a specific set of duct problems that flat-valley cities don’t. The Woolsey Fire in November 2018 burned through this community and left a contamination signature in surviving homes that’s still circulating through duct systems today. Combined with original 1970s-1990s flex duct now hitting 30-50 years of age, and Santa Ana winds that pull chaparral dust through every gap in the building envelope, you’ve got a recipe for poor airflow, high energy bills, and air quality that doesn’t match what your house should deliver. That’s where our Duct Repair & Sealing team comes in.
Why Bellows Air Duct & Vent Co. Is Agoura Hills’s Preferred Duct Repair & Sealing Company
We’ve built our reputation in Agoura Hills on showing up when we say and standing behind the work. Our 90-Day Done Right Promise means if a seal fails or a repair doesn’t hold, we come back at no charge with no paperwork to argue over. It’s stamped on every job, and it’s been our policy since Ray Castillo founded the company in 1984.
Our technicians are background-checked, uniformed, and carry camera inspection equipment from Rotobrush and Nikro. Every Agoura Hills job gets photographed before and after, so you see the crack in your flex duct or the gap in your mastic seal with your own eyes. No claims without proof.
Calls are answered by a live person 24 hours a day, not an app or a voicemail tree. Most repairs are completed in a single visit because our trucks carry the flex duct, mastic, and insulation materials that Agoura Hills’s older housing stock typically needs. We’ve worked on homes from the Lake Lindero area to the Palo Comado Canyon edge, and we understand the difference between a 1978 tract home off Agoura Road and a custom build in the Morrison Ranch area.
Our pricing is disclosed upfront before a single tool is lifted. The number we give on the phone is the number on the invoice. We don’t bait with a low coupon and then find “unexpected problems” once we’re in your attic.
Our Duct Repair & Sealing Services in Agoura Hills
Duct Sealing
Most Agoura Hills homes built between 1975 and 1995 were sealed at construction with cloth-backed tape that dries out and delaminates in our semi-arid heat. We remove that failed tape and seal every joint, seam, and penetration with mastic sealant, the standard that professional HVAC contractors specify for permanent repairs. A typical duct sealing job in Agoura Hills runs $280-$450 for a single system, depending on how many runs need attention. We pressurize the system afterward to verify the seal held.
Flex Duct Repair
Original flex duct in Agoura Hills was often poorly supported, leading to kinked runs, crushed sections, and sagging that traps debris and restricts airflow. We replace damaged sections with new insulated flex, properly supported with strapping at the intervals the manufacturer requires. A single flex duct repair typically costs $180-$320 in Agoura Hills; a full replacement of an original system runs $1,200-$2,400. We sealed a 1985 flex duct system off Chesebro Road where Santa Ana winds had pulled attic dust through failed cloth-taped seams, and the return boot still held Woolsey ash. After mastic-sealing every leak and wrapping the exposed flex in fresh insulation, airflow improved 40% and the homeowner finally stopped finding gray dust on their furniture.
Metal Duct Repair
Some Agoura Hills homes, particularly custom builds from the 1980s and early 1990s, used galvanized metal ductwork. These systems develop rust at seams where condensation collects, and the original sealant fails over decades. We cut out corroded sections, fabricate replacements, and seal with mastic rated for metal-to-metal joints. Metal duct repair in Agoura Hills typically runs $350-$580 per section, with full restoration of a deteriorated system reaching $800-$1,400.
Duct Insulation
Uninsulated or degraded duct insulation in Agoura Hills attics wastes energy and allows attic heat to radiate into conditioned air. We wrap repaired or new flex duct with R-6 or R-8 insulation, depending on your attic configuration, and secure it with proper mechanical fasteners rather than tape that’ll fail in two summers. Duct insulation work in Agoura Hills generally adds $120-$240 to a sealing or repair job, or $600-$1,100 for a full system re-wrap.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Agoura Hills
Our trucks carry professional-grade equipment and materials from Rotobrush, Nikro, and Abatement Technologies, the same brands serious HVAC contractors specify for commercial and high-end residential work. For Agoura Hills customers, this means we don’t need to order parts and make you wait. We stock the flex duct diameters, mastic compounds, and insulation wraps that match what was installed in your 1980s or 1990s home, so most jobs finish in one visit. If your system uses specialized components from Honeywell or Aprilaire controls, we source those through our Los Angeles supply house with next-day availability.
Common Duct Repair & Sealing Problems We See in Agoura Hills Homes
- Original cloth-backed tape has dried and delaminated. The semi-arid heat in Agoura Hills accelerates tape failure, pulling attic air, insulation fibers, and post-fire particulate directly into your living space through gaps you can’t see from the vent grille.
- Builder-grade flex duct was poorly supported and has kinked or crushed. These restricted sections reduce airflow to distant rooms, often the master bedroom at the far end of a Morrison Ranch or Lake Lindero floor plan, and trap debris that breaks loose every time the blower cycles.
- Return grilles facing open-space corridors draw chaparral dust and wildfire smoke. During Santa Ana wind events, fine particulate from the Santa Monica Mountains enters through every gap in the building envelope and concentrates in return-air ducts, creating a contamination load that standard 1-inch filters never catch.
- Woolsey Fire ash remains embedded in duct interiors. Technicians working near Chesebro Road and Palo Comado Canyon frequently find a visible gray-black ash layer beneath years of subsequent dust. Homeowners who replaced filters after November 2018 but never had ducts cleaned or sealed are recirculating that residue every cooling season.
Pricing for Duct Repair & Sealing in Agoura Hills, CA
| Service | Typical Range in Agoura Hills |
|---|---|
| Basic duct sealing (mastic, single system) | $280-$450 |
| Single flex duct repair/replacement | $180-$320 |
| Metal duct section repair | $350-$580 |
| Duct insulation (add to repair) | $120-$240 |
| Full flex duct system replacement | $1,200-$2,400 |
| Full metal duct restoration | $800-$1,400 |
| Full system re-insulation | $600-$1,100 |
What moves you within these ranges? Three things: how accessible your attic is, how many runs need work, and whether we’re repairing or replacing. A single-story home with a truss attic and clear pathways costs less than a two-story with a tight crawl space and crushed flex under a bathroom addition. We show you the camera footage, explain what we found, and give you the exact price before we start. No bait, no switch, no “we found something else” once the tools are out.
We also honor our standing offers: $50 off any repair over $250, a free second opinion on any written estimate you’ve already received, and a permanent 5% discount for seniors and veterans. Ask about our $89 Seasonal Tune-Up when you call.
We Also Serve Cities Near Agoura Hills
Our service area covers Agoura Hills and the surrounding communities including Agoura, Oak Park, Thousand Oaks, and Calabasas. The same technicians, the same trucks, the same upfront pricing policy. If you’re in the 91301 or 91376 ZIP codes, we’re already familiar with your neighborhood’s housing stock and duct configurations.
Serving Agoura Hills, CA - Our Local Coverage Area
We’re based in the Agoura Hills area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Duct Repair & Sealing in Agoura Hills
Yes, duct sealing and repair can stop the recirculation of embedded ash and dust that cleaning alone doesn’t address. The gray dust you’re seeing is likely a mixture of Woolsey Fire residue and subsequent debris that entered through failed tape seals and pulled into the living space with every blower cycle. We camera-inspect the system, seal every leak with mastic to stop attic and return-side infiltration, and replace any damaged flex that holds debris. Many Agoura Hills homeowners see the dust problem resolve within days of proper sealing. Call (844) 685-6342 for a free camera inspection and estimate.
The original cloth-backed tape used in 1980s Agoura Hills construction dries out and delaminates in our semi-arid climate, and the flex was often poorly supported with strapping that sagged or failed. That combination means seams open, kinks develop, and the duct pulls unconditioned attic air directly into your system. We replace failed tape with permanent mastic seals, repair or replace crushed sections, and re-support runs with proper hanging hardware. A typical 1980s system in Agoura Hills needs $280-$650 in sealing and repairs to restore proper airflow. Call (844) 685-6342 for an exact quote.
Yes, Santa Ana winds drive fine dust, ash, and smoke through gaps in your building envelope and into return-air grilles, especially if your home faces open-space corridors near Chesebro Road or Palo Comado Canyon. The low humidity means this debris stays dry and friable, easily re-aerosolized every time your air handler turns on. Sealing your return plenum, replacing degraded filter housings, and ensuring your duct system is pressurized properly reduces how much outdoor particulate enters and circulates. Most Agoura Hills homes need attention to the return side, not just the supply. Call (844) 685-6342 and we’ll show you on camera where the leaks are.
Failed tape seams at flex-to-metal connections, crushed or kinked flex runs in tight attic spaces, and deteriorated return boots near filter grilles are the three most common failures we see in Agoura Hills. The return boot is particularly vulnerable because it’s where Santa Ana-borne debris first enters the system, and the temperature differential causes expansion and contraction that breaks seals faster than supply-side components. We inspect all three areas with camera equipment and quote repairs before we start. Typical repairs run $180-$580 depending on how many locations need work. Call (844) 685-6342 for a free estimate.
Yes, proper duct sealing and repair removes the contamination reservoirs and stops the recirculation loop that keeps wildfire particulate in your breathing air. Cleaning removes loose debris, but if your ducts still leak at seams and connections, new contamination enters with every cycle. Our process in Agoura Hills includes camera inspection to locate ash layers, mastic sealing of all leaks, repair or replacement of damaged flex that traps residue, and verification that your return side isn’t pulling unfiltered outdoor air. For homes with known Woolsey Fire exposure, we recommend sealing as the necessary follow-up to any cleaning. Call (844) 685-6342 to schedule a camera inspection and upfront quote.
Ready to stop the dust, improve your airflow, and get your Agoura Hills home’s duct system working the way it should? Call Bellows Air Duct & Vent Co. at (844) 685-6342. We’ll answer live, schedule you at a time that works, and show up with the tools and materials to finish most jobs in a single visit. Your estimate is free, your price is locked before we start, and our 90-Day Done Right Promise backs every seal and every repair in writing.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Agoura Hills since 1984.